Feature request

- Need to be able to create categories and add miner to categories (because I have a few datacenter and want to see it separate).
- Neet to be able to reorder or manually order the miners (right now the way to do that is to add the miners 1, next 2, next 3. But If I have new miners It will bed the last in the list.
- Alerts by email if any miner is down for more than x checks, (run check on background) and alert by email if the temperature is above xx.